Car-wheel and process of making same.



No. 794.277. PATENTED JULY 11, 1905.

w. B. BRAYTON. I 'GAR WHEEL AND PROCESS OF MAKING SAME.

APPLICATION FILED SEPT. 27. 1904.

a mi 66665 i Lzue 11.1301

ifiiw mx S I m 719. /St

NTTEn STATES Patented July 11, 1905.

PATENT Orrice.

WVILLIAM B. BRAYTON, OF CLEVELAND, OHIO, ASSIGNOR TO THE BRAYTONWOODRUFF COMPANY.

CAR-WHEEL AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 794,277, dated July 11,1905.

Application filei September 2'7, 1904. Serial No. 226,144.

To all whom, it may concern.-

Be it known that I, WILLIAM B. BRAYTON, a citizen ofthe United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Car-WVheels andProcesses of Making the Same, of which the following is a full, clear,and exact description, reference being had to the accompanying drawings.

Gar-wheels having steel tires are very desirable by reason of theirwear-resistin g power; but there has always been difliculty in effectingan eflicient securement of the tire to the wheel-body. One method hasbeen to shrink the tire onto the bod y;-but this has resulted in thetire sometimes becoming hot in use from the application of the brake andexpanding and working ofi the wheel-body. Another method has been tobolt the tire to the wheelbody; but this is expensive and the bolts intime wear loose.

The object of the present invention is to provide a method of securingthe tire to the wheel-body which shall be cheap and efiicient, resultingin remedying the defects of the present methods of shrinking the tire onor bolting it. I have found that if a small projecting rib is formed onthe periphery of the wheel-body and a corresponding recess formed in theinner periphery of the tire, the tire, by being heated very much hotterthan any heat it will ever attain in use, may be expanded sufficientlyto slip into place over such rib and contracting will finally seatitself on the body with the rib occupying the recess. In order to insurethe rib being entirely within the recess, I make the rib somewhatsmaller than the recess, and thus when the tire shrinks into place thereis no danger of the base of the recess resting on the face of the riband straining the tire, as would result were the rib made a little toohigh or the recess a little too shallow.

My invention comprises such a method of making car wheels and the carwheel when thus constructed.

The invention is also more fully hereinafter explained and its definitecharacteristics set out in the claims.

In the drawings, Figure 1 is a side elevation of my car-wheel, and Fig.Qis an enlarged cross-section through the rim and tire thereof.

A represents the body of the wheel, which may comprise a hub a, a rim(0, and a suitable Web or spokes (0 B represents the tire, having theusual flange 6.

On the outer periphery of the rim 0, about midway between the edgesthereof, is formed a projecting rib (0 I have found in practice thatthis rib in ordinary-sized carwheels may be conveniently made half aninch wide and of a height a little over a sixteenth of an inch. The ribhas a cylindrical outer face and abrupt edges meeting the rim-face atright angles. In the inner periphery of the tire B is a groove 6 whichis somewhat deeper than the height of the rib a and slightly wider thanthe width of that rib.

In making this wheel the parts are formed as described by any suitabletools and apparatus. Then the tire is heated approximately to a red heatand is passed over the periphery of the body and allowed to shrink intoplace. By making the rib a smaller than the groove all danger of thetire resting on this rib, and thus straining itself when it contractsinto place, is removed. This is an importantpoint, for if the fit of therib and groove is perfect any foreign matter resting on the rib or anywant of accuracy in placing the tire would cause the tire to strain whenit shrinks into place. It would shrink into place notwithstanding suchimproper connection, and the result would not be observable from theoutside; but the tire would be under a constant strain and liable torupture.

In the case of car-wheels, where human life depends on theirreliability, it is very essential that there be no strains within thewheel which, while being unobservable, might result in its breakage atany time. The fit of the rib and groove is close enough to absolutelyprevent the tire working off at the body, for it never in use becomesheated high enough to enable it to slide laterally across the rib.

I claim 1. The process of making car-wheels consisting in forming awheel-body with a rib on 1ts outer periphery and a tire with a groove onits inner periphery, the rib being of less its outer periphery and atire with a corresponding groove on its inner periphery, the rib havinga cylindrical face and abrupt edges and being of less depth and widththan the groove, in heating the tire and placing it around the body andallowing it to shrink into place.

3: A car-wheel consisting of a body having a rib on its outer peripheryand a metal tire surrounding the body, and having a groove on its innerperiphery receiving the rib, the groove being of greater depth than therib.

4:. A car-wheel consisting of a body having on its outer periphery a ribwith abrupt edges, and a metal tire surrounding the body and having agroove on its inner periphery receiving the rib, the groove being ofgreater depth and Width than the rib.

5. In a car-wheel, in combination, a body having a rim portion with acylindrical exterior on which there is formed a projecting rib having acylindrical outer face, the rib rising from the periphery of the bodyonly a short distance, and a metal tire surrounding said body and snuglyembracing its cylindrical periphery except at the rib, Whose cylindricalface it clears.

6. In a car-wheel, in combination, a body having a rim portion with acylindrical exterior on which there is formed near the middle line aprojecting rib having a cylindrical outer face and edges at right anglesthereto, the rib rising from the periphery of the body only a smallfraction of an inch, and a steel tire surrounding said body and snuglyembracing its cylindrical periphery except at the rib, which it looselysurrounds.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

WILLIAM B. BRAYTON.

Witnesses:

ALBERT H. BATES, B. W. BROCKETT.

